Add a target script to run uClibc test suite

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Fix invalid variable name

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Fix error in uclibc test suite script for target

1. Create install_Dir required by target
2. Log stderr as well as stdout to the log file.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>